Piston ring gauge



June 28, 1932 F, p RALPH 1,865,388

PISTON RING GAUGE Original Filed April 6, 1929 so" g i .21 a E Q INVENTOR ATTORNEY ?atented 253, 1932 TTS IEBANCIS 1 RALPH, OF BUTTE, MONTANA EISTCN RING- GAUGE Application filed Jiprll 6, 1329, Serial No.

his invention relates to gauges especially adaptec for use in fitting piston rings, an ob j of the invention being to provide a gauge which may be adjusted to a fitted ring and the remaining rings fitted by placin them in the gauge without requiring a separate littin; for each individual ring.

Another object of the invention is the provision of a gauge within which the rin "may be held for convenience when filing, the construction of the gauge being such that the rings may be removed and replaced without disturbing the adjustment.

With the above and other objects in view, the invention further includes the followi g novel features and details f construm tioii, to be hereinafter more fully descr bed, illustrated in the accompanying drawin and pointed out in the appended claims.

In the drawing Figure 1 is a top plan view illustrating use of the invention Figures and 3 are sections taken respec tively on the lines 2-2 and 3-3 o Figure 1.

Figure is an elevation of the p Figure 5 is a transverse sectional view.

Referring to the drawing in detail wherein like characters of reference denote corre sponding parts, the invention as shown comprises a block or holder which is indicated generally at 10 and which includes a rear wall 11 and spaced parallel side walls 12.

Mounted for transverse adjustment within the holder is a clamping block 13. This block extends longitudinally of the holder and is provided with a right angularlv disposed foot 14 and with a rearward extendin g lug 15, the latter being slidable within a slot 16 which is disposed transversely of the rear wall 11 of the block or holder 10.

Journaled in the clamping block 13 as shown at 17 is a screw 18 which is provided upon its outer end with a knurled finger piece 19. This screw extends through an opening 20 which is disposed longitudinally of the block 13 and into a relatively wide slot 21 which communcates with the opening 20. Slidably mounted in the slot 21 is a stop 22. i This stop is provided with a threaded bore 23 50 which engages the threaded end 24 of the 353135 Renewed November 18, 1931.

screw 18, so that when the latter is rotated the stop 22 will bemoved longitudinally of the block 10. r

Extending from opposite sides of the stop 22 beyond the side edges of the block are lugs 25 which are adapted to engage shoulders26 provided upon the notched ends of a piston ring 27, as will be hereinafter explained.

A thumb screw 28 threadedly engages the lug 15 of the block 13 so that the block may be adjusted with respect to the side walls 12 of the holder to clamp the ring between the block and one of said walls as shown in Figure 1 of the drawing.

Mounted for adjustment longitudinally of the block13 is a slide 29' which is provided with a longitudinal slot 30 for thepassage of a binding screw 31, the latter having threaded engagement with the block 13 in either one of a pair of threaded openings 32. The slide29 is provided at opposite ends with outwardly extending lugs 33 and 34 which are beveled as shown and which are adapted to engage the ring 27.

The screw 18 is removably mounted within the block 18 and for this purpose the block carries a removable L -shaped plate 35.

In the use of the invention, a ring is properly fitted within a cylinder and thereafter placed within the gauge and the stop 22 is set so that the lugs 25 will be positioned to bring the end of the ring flush with the upper face of the holder when the shoulder 26 engages one of the lugs 25. The slide 29 may then be adjusted to bring either of the lugs 33 into contact with the ring as shown in Figure 2 of the drawing, or one of the lugs 34: may be engaged with the ring. The fitted ring may then be removed from the gauge and a ring to be fitted may be placed within the gauge with the clamping block adjusted so that the ring will be clamped against this block and the adjacent wall 12. The end of the ring may then be filed down flush with the upper edge of the gauge. As the lugs 25, 33 and 34 are duplicated upon opposite sides of the clamping block 13, the invention may be used with rings having either right hand or left hand notches.

For convenience, the holder may be clamped within a vise, a portion of the aws of which are indicated at 36 in Figure 1 of the drawing.

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall Within the scope of the appended claims.

Having described the invention what is claimed is 1. A piston ring gauge comprising a member having a rear Wall and spaced parallel side walls, a clamping block carriedby said member and adjustable with respect to said side walls, means to hold said block in adjusted position, a stop slidably connected with the clamping block and including a ring engaging lug projecting beyond the side of the clampingblock, means to adjust the stop and a ring engaging slide adjustably mounted upon the clamping block.

2. A piston ring gauge comprising a member having a rear wall and spaced parallel side walls a clamping block carried by said member and adjustable with respect to said side Walls, means to hold said block in ad justed position, a stop slidably connectedwith the clamping block, oppositely disposed ring engaging lugs included inthe stop and extending beyond opposite sides of the clamping block, means to adjust the stop and a ring engaging slide adjustably mounted upon the clamping block.

3. A piston ring gauge comprising a memher having a. rear wall and spaced parallel side Walls, a clamping block carried by said member and adjustable with respect to said side walls, means to hold said block in ad: j usted position, a stop slidably connected with the clamping block, oppositely disposed ring engaging lugs included in the stop and extending beyond opposite sides of the clampving block, means to adjust the stop, a slide adjustably mounted upon the clamping block, meansto hold'the slidein adjusted position, and ring engaging lugs extending from the slide and-cooperating with the lugs of the stop. 7 I

In testimony whereof I aifix my signature.

' FRANCIS P. RALPH. 

